Final answer:
The type of interview where major questions are determined beforehand but allows for probing in other areas is called a semi-structured interview.
Step-by-step explanation:
An interview in which the interviewer prepares major questions in advance but remains flexible enough to explore additional areas during the conversation is known as a semi-structured interview. This type of interview combines elements of both the structured and unstructured interview approaches. The interviewer has a clear set of questions which are used for all interviewees, thus ensuring a level of consistency across interviews. However, unlike structured interviews, the interviewer has the freedom to probe further into specific areas or follow new leads that arise during the interview, which allows for a deeper understanding of the respondent’s perspective.